example of use of psycopg's async api

Hi.

For people interested, I'm testing the asynchronous API of psycopg2.

The example can be found here:
http://hg.mperillo.ath.cx/nginx/mod_wsgi/file/tip/examples/nginx-postgres-async.py


It is a WSGI application executed by my WSGI module for Nginx, using a 
WSGI extension for asynchronous applications support (ngx.poll).

The example is very simple, it uses a connection pool that can grow 
indefinitely.


Some notes:

1) the documentation of the async API contains some errors.
    I will try to write a patch (unfortunately now the web site is not
    accessible).

2) psycopg2 only supports asynchronous reading of a query result?
    libpq offers asynchronous support for connection establishing and
    for sending a query (useful for large COPY operations)



Manlio Perillo